The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2022
Filed:
Jul. 14, 2017
Applicant:
Dai-ichi Seiko Co., Ltd., Kyoto, JP;
Inventors:
Kenji Ogata, Ogori, JP;
Shogo Kurogi, Ogori, JP;
Keita Matsuoka, Ogori, JP;
Yoshiyuki Watanabe, Takasaki, JP;
Assignee:
DAI-ICHI SEIKO CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 17/00 (2006.01); H04R 7/06 (2006.01);
U.S. Cl.
CPC ...
H04R 7/06 (2013.01); H04R 17/00 (2013.01);
Abstract
Diaphragms () each include laminated layers including a piezoelectric layer. The diaphragms () are each warped to oscillate due to expansion and contraction of the piezoelectric layer or due to an oscillatory force from the outside. The diaphragms have mutually different resonance frequencies. A casing () has an internal space (C) for accommodating the diaphragms () and a fixing part (D) for fixing a portion of each of the diaphragms (). The casing () transmits oscillations between the diaphragms () and the outside via the fixing part (D).